54
EXTERNAL ENVELOPE
MMC build system featuring Wraptite® membrane delivers lower carbon solution
Ltd J
ust eight weeks on site were all that was required for JPSE (John Plummer Sustainable to erect
Engineering) their light
Construction gauge
steel
frame system on a derelict pub site on Whitchurch Road in Telford. Working on behalf of Tailored Lifestyle Group, the work included fi tting cement particle
sheathing
boards and applying Proctor Group’s Wraptite®
membrane.
Thanks to Wraptite’s proven performance characteristics,
the entire structure had
its airtightness line in place, and enjoyed temporary weather protection, less than two months after the screw pile foundations and ground beams were fi rst installed – a testament to the benefi ts that modern methods of construction (MMC) can offer. As well as employing MMC to best effect,
Tailored Lifestyle Group integrates low carbon principles on every scheme it develops – including reduced concrete use and fabric fi rst design.
The lightweight steel frame is central to that approach. Not only does it impose lower loads onto the screw pile foundations, but it also makes constrained sites more viable. The brownfi eld site at Whitchurch Road had been subject of numerous failed redevelopment attempts. Despite a constrained site, Tailored Lifestyle Group were able to arrange just in time deliveries of the steel frame components, all offl oaded without the use of a crane. “There is no ‘one size fi ts all’ solution in construction,” said Kieran Danby, co-founder of Tailored Lifestyle Group. “We called ourselves ‘tailored’ because we believe in
adopting the right approach for our client and the site. At Whitchurch Road, the light gauge steel frame was a perfect solution. There would have been so much more risk had we adopted a different solution.” As a self-adhered membrane, Proctor
Group’s Wraptite provides a consistent airtight seal without the need for additional primers or adhesives. It places the building’s airtightness line on the external face of the structure, away from the ‘services zone’ at the internal face. Continuing the Wraptite from the walls to the roof further reduces thermal bridging and delivers a better standard of airtightness.
At the same time as providing a high level of airtightness, Wraptite is also vapour permeable. Allowing moisture vapour to pass through the structure eliminates any potential for condensation risk within the wall or roof build-up.
01250 872261
www.proctorgroup.com
RapidTray: Designed for faster, compliant cavity tray installation
R
apidTray is a new cavity tray and DPC system from OBEX, developed to help contractors and specifi ers address increasing pressure around compliance, installation speed and build consistency. With tightening building safety requirements and growing programme demands, the system is designed to remove uncertainty from cavity tray installation while maintaining high standards of fi re and moisture performance. The new product is a next generation addition to the wide range of construction products offered by OBEX. RapidTray simplifi es on-site installation through a combination of pre-formed components, integrated fi xings and a fl exible membrane, reducing complexity and helping ensure consistency across the build. It achieves a Class
A2-s1,d0 fi re
classifi cation, offering performance which is supported by a comprehensive programme of independent testing and verifi cation. Fire classifi cation has been tested in accordance
there is increasing pressure to deliver compliant buildings without impacting programme or cost.
RapidTray was
with BS EN 13501-1:2018, with testing carried out under conditions representative of real-world applications, including ventilated cavity scenarios.
The system has also undergone BBA
water-fl ow testing and has a Kiwa agrément, demonstrating its effectiveness in managing moisture and protecting the building fabric over the long term. David MacDonald, global chief revenue offi cer at OBEX, says: “Across the industry,
developed to simplify installation at the point it matters most, reducing complexity on site while maintaining the levels of fi re and moisture performance that specifi ers expect. It’s about giving teams greater certainty that systems are installed correctly, fi rst time.” Suitable for residential and commercial brickwork facade applications, RapidTray is designed to support faster construction programmes while maintaining compliance with current building standards. As an OBEX Cortex product, RapidTray is supported by a structured delivery package that includes design input,
specifi cation
guidance and on-site support through to fi nal sign-off, helping ensure the system performs as intended throughout the build process.
01905 337800
obexglobal.com/uk/rapidtray
WWW.ARCHITECTSDATAFILE.CO.UK
ADF JULY/AUGUST 2026
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